diff --git a/test/run-tests.c b/test/run-tests.c
index 6c92c2b7a..3a6452ffd 100644
--- a/test/run-tests.c
+++ b/test/run-tests.c
@@ -211,7 +211,11 @@ static int maybe_run_test(int argc, char **argv) {
     notify_parent_process();
     ASSERT(sizeof(fd) == read(0, &fd, sizeof(fd)));
     ASSERT(fd > 2);
+# if defined(__PASE__)  /* On IBMi PASE, write() returns 1 */
+    ASSERT(1 == write(fd, "x", 1));
+# else
     ASSERT(-1 == write(fd, "x", 1));
+# endif  /* !__PASE__ */
 
     return 1;
   }
diff --git a/test/test-spawn.c b/test/test-spawn.c
index be9e2539a..2b7f5d56d 100644
--- a/test/test-spawn.c
+++ b/test/test-spawn.c
@@ -1420,6 +1420,8 @@ TEST_IMPL(spawn_setuid_fails) {
   int r;
 
   /* if root, become nobody. */
+  /* On IBMi PASE, there is no nobody user. */
+#ifndef __PASE__
   uv_uid_t uid = getuid();
   if (uid == 0) {
     struct passwd* pw;
@@ -1428,11 +1430,19 @@ TEST_IMPL(spawn_setuid_fails) {
     ASSERT(0 == setgid(pw->pw_gid));
     ASSERT(0 == setuid(pw->pw_uid));
   }
+#endif  /* !__PASE__ */
 
   init_process_options("spawn_helper1", fail_cb);
 
   options.flags |= UV_PROCESS_SETUID;
+  /* On IBMi PASE, there is no root user. User may grant 
+   * root-like privileges, including setting uid to 0.
+   */
+#if defined(__PASE__)
+  options.uid = -1;
+#else
   options.uid = 0;
+#endif
 
   /* These flags should be ignored on Unices. */
   options.flags |= UV_PROCESS_WINDOWS_HIDE;
@@ -1441,7 +1451,7 @@ TEST_IMPL(spawn_setuid_fails) {
   options.flags |= UV_PROCESS_WINDOWS_VERBATIM_ARGUMENTS;
 
   r = uv_spawn(uv_default_loop(), &process, &options);
-#if defined(__CYGWIN__)
+#if defined(__CYGWIN__) || defined(__PASE__)
   ASSERT(r == UV_EINVAL);
 #else
   ASSERT(r == UV_EPERM);
@@ -1461,6 +1471,8 @@ TEST_IMPL(spawn_setgid_fails) {
   int r;
 
   /* if root, become nobody. */
+  /* On IBMi PASE, there is no nobody user. */
+#ifndef __PASE__
   uv_uid_t uid = getuid();
   if (uid == 0) {
     struct passwd* pw;
@@ -1469,18 +1481,22 @@ TEST_IMPL(spawn_setgid_fails) {
     ASSERT(0 == setgid(pw->pw_gid));
     ASSERT(0 == setuid(pw->pw_uid));
   }
+#endif  /* !__PASE__ */
 
   init_process_options("spawn_helper1", fail_cb);
 
   options.flags |= UV_PROCESS_SETGID;
-#if defined(__MVS__)
+  /* On IBMi PASE, there is no root user. User may grant 
+   * root-like privileges, including setting gid to 0.
+   */
+#if defined(__MVS__) || defined(__PASE__)
   options.gid = -1;
 #else
   options.gid = 0;
 #endif
 
   r = uv_spawn(uv_default_loop(), &process, &options);
-#if defined(__CYGWIN__) || defined(__MVS__)
+#if defined(__CYGWIN__) || defined(__MVS__) || defined(__PASE__)
   ASSERT(r == UV_EINVAL);
 #else
   ASSERT(r == UV_EPERM);